Rigidity tuning structure of transmission cable for manual transmission

Abstract

A transmission cable for transmitting operation of a transmission lever to a select arm or a shift arm is disposed in a curved state in a manual transmission. An inner cable protrudes from an outer tube of the transmission cable, whereby a set load in a compressing direction is generated in the inner cable. However, by ensuring that the rigidity of a rubber bush for connecting one end of the inner cable to the select arm or the shift arm is set so that it is lower in a direction of pushing the inner cable than in a direction of pulling the inner cable to provide an anisotropic property, the set load in the compressing direction in the inner cable can be countervailed by a difference in rigidity of the rubber bush between a pushing direction and a pulling direction to eliminate deterioration in shifting feeling.

1 . A rigidity tuning structure of a transmission cable for a manual transmission in which a transmission cable for transmitting operation of a transmission lever by a driver to a manual transmission comprises an outer tube and an inner cable slidably accommodated within the outer tube, the outer tube being fixed at one end to a casing of the manual transmission, and the inner cable being connected at one end to a select arm or a shift arm of the manual transmission through an elastic member, 
 wherein rigidity of the elastic member differs between a pushing direction and a pulling direction of the inner cable.    
   
   
       2 . The rigidity tuning structure according to  claim 1 , wherein the elastic member has a pair of voids associated with surfaces on opposite sides thereof such that the rigidity of the elastic member differs between the pushing direction and the pulling direction of the inner cable.  
   
   
       3 . The rigidity tuning structure according to  claim 2 , wherein the voids have different widths.  
   
   
       4 . The rigidity tuning structure according to  claim 2 , wherein the elastic member is disposed within a shell, and the voids are formed between the elastic member and the shell.  
   
   
       5 . A rigidity tuning structure of a transmission cable for a manual transmission in which a transmission cable for transmitting operation of a transmission lever by a driver to a manual transmission comprises an outer tube and an inner cable slidably accommodated within the outer tube, the inner cable being connected at one end to a select arm or a shift arm of the manual transmission, and the outer tube being supported at one end on a casing of the manual transmission with an elastic member interposed therebetween, 
 wherein rigidity of the elastic member differs between a pushing direction and a pulling direction of the outer tube.    
   
   
       6 . The rigidity tuning structure according to  claim 5 , wherein the elastic member comprises a pair of bushes, one of the bushes is compressed between the transmission casing and the outer tube in the pushing direction of the outer tube, and other bush is compressed between the transmission casing and the outer tube in the pulling direction of the outer tube, and the bushes have different rigidities.  
   
   
       7 . The rigidity tuning structure according to  claim 6 , wherein the bushes have different thicknesses giving the different rigidities.  
   
   
       8 . A rigidity tuning structure of a transmission cable for a manual transmission in which a transmission cable for transmitting operation of a transmission lever by a driver to a manual transmission comprises an outer tube and an inner cable slidably accommodated within the outer tube, the outer tube being fixed at one end to a casing of the manual transmission with a first elastic member interposed therebetween, and the inner cable being connected at one end to a select arm or a shift arm of the manual transmission through a second elastic member, 
 wherein rigidity of at least one of the elastic members differs between a pushing direction and a pulling direction of the inner cable.    
   
   
       9 . The rigidity tuning structure according to  claim 8 , wherein the second elastic member has a pair of voids associated with surfaces on opposite sides thereof such that the rigidity of the elastic member differs between the pushing direction and the pulling direction of the inner cable.  
   
   
       10 . The rigidity tuning structure according to  claim 9 , wherein the voids have different widths.  
   
   
       11 . The rigidity tuning structure according to  claim 9 , wherein the second elastic member is disposed within a shell, and the voids are formed between the elastic member and the shell.  
   
   
       12 . The rigidity tuning structure according to  claim 8 , wherein the first elastic member comprises a pair of bushes, one of the bushes is compressed between the transmission casing and the outer tube in the pushing direction of the outer tube, and other bush is compressed between the transmission casing and the outer tube in the pulling direction of the outer tube, and the bushes have different rigidities.  
   
   
       13 . The rigidity tuning structure according to  claim 12 , wherein the bushes have different thicknesses giving the different rigidities.